[johnny]

Uhm, if we're talking about weaknesses = cool, Batman's weaknesses are:

Guns
Knives
Poison
Gravity
Weight
Every single thing on the earth that can kill a normal human because he's just a normal human.

Superman's weakness is just green Kryptonite, which is rare on the planet (no matter what the show Smallville seems to think).

I mean, they're both cool, but in a fight of Superman vs. Batman, Superman's going to win.